Purnia vs Ulhasnagar
Side-by-side air quality comparison between Purnia and Ulhasnagar.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Ulhasnagar averaged 117 — a 16-point (14%) gap, with Purnia the more polluted and Ulhasnagar the cleaner of the two. On 383 days when both cities reported, Ulhasnagar was cleaner on 224 of them; the average daily gap was 57 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Ulhasnagar 74 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).